Xie Xiang, a kind and righteous girl, joined the army on behalf of her brother, disguised herself as a man to study at the Liehuo Military Academy, and became classmates with the cynical rich boy Gu Yanzhen and the calm and steady Shen Junshan, and gradually developed into comrades-in-arms fighting side by side. Under the strict and cruel training mechanism of the military academy, Xie Xiang not only had to try hard to hide the secret of her disguise as a man, but also had to overcome the various inconveniences of her life as a woman in the military academy. More importantly, she had to overcome her weak physique, strive to complete all the training in the military academy, and graduate successfully. In the process, Xie Xiang and her classmates experienced a series of major events, which also triggered a series of ridiculous stories. In the end, Xie Xiang not only achieved outstanding results through her unremitting efforts, but also won the respect of the instructors, and at the same time, captured the hearts of two outstanding male classmates. Afterwards, the Japanese army increased its troops in Shunyuan, and Oda Xianrong, who loved Shen Junshan, returned from overseas as the president of the Japanese Chamber of Commerce, and a series of conspiracies and traps followed. With the help of her classmates, Xie Xiang fought against the Japanese, gradually grew up in the bloody storm, crushed Oda Xianrong's conspiracy, and finally got together with Gu Yanzhen.